Telephone call progress recording system



Nov. 17, 1964 R. c. AVERY TELEPHONE CALL PROGRESS RECORDING SYSTEM 2O Sheets-Sheet l Filed March 6, 1962 vill-I y l /Nl/ENTOR RCAVERY gf@ @mm- A TTD/RNW Nov. 17, 1964 R. c. AVERY TELEPHONE CALL PROGRESS RECORDING SYSTEM 20 Sheets-Sheet 2 Filed March 6, 1962 TSN Nov. 17, 1964 R. c. AVERY TELEPHONE CALL PROGRESS RECORDING SYSTEM 2O Sheets-Sheet 3 Filed March 6, 1962 New@ dixo Nov. 17, 1964 R. c. AVERY TELEPHONE CALL PROGRESS RECORDING SYSTEM 2O Sheets-Sheet Filed March 6, 1962 v @Fx R. c. AVERY 3,157,743

TELEPHONE CALL PROGRESS RECORDING SYSTEM 2O Sheets-Sheet 5 Nov. 17, 1964 Filed March 6, 1962 Nov. 17, 1964 R. c. AVERY TELEPHONE CALL PROGRESS RECORDING SYSTEM Filedxarcn e, 1962 A 20 Sheets-Sheet 6 n di.

2O Sheets-Sheet 7 R. C. AVERY TELEPHONE CALL PROGRESS RECORDING SYSTEM Nov. 17, 1964 Filed March 6, 1962 Nov. 17, 1964 R. c. AVERY TELEPHONE CALL PROGRESS RECORDING SYSTEM 20 Sheets-Sheet 8 Filed March 6, 1962 QOm.

556mm d QOm,

Uhl

NOW

m. .um

Nov. 17, 1964 R. c. AVERY TELEPHONE CALL RRoGREss RECORDING SYSTEM 20 SheetS-Sheet 9 Filed March 6, 1962 Nov. 17, 1964 R. c. AVERY TELEPHONE CALL PROGRESS RECORDING SYSTEM Filed March e, 1962 2O Sheets-Sheet 10 Nov. 17, 1964 R. c. AVERY TELEPHONE CALL. PROGRESS RECORDING SYSTEM Filed March 6, 1962 2O Sheets-Sheet 11 SNK GOK

Nov. 17, 1964 R. c. AVERY TELEPHONE CALL. PROGRESS RECORDING SYSTEM 2O Sheets-Sheet 12 Filed March 6,

Tg3 n Nov. 17, 1964 R. c. AVERY TELEPHONE CALI.. PROGRESS RECORDING SYSTEM 20 Sheets-Sheet l5 Filed March 6, 1962 Nov. 17, 1964 R. c. AVERY TELEPHONE CALL PROGRESS RECORDING SYSTEM Filed March s. v1962 2O Sheets-Sheet 14 III-I.

@WIND Ok R. c. AVERY 3,157,743

TELEPHONE CALL PROGRESS RECORDING SYSTEM 2O Sheets-Sheet 15 Nov. 17, 1964 Filed March e, 1962 #T i d@ mfmf? 55-5-5 www@ GMG Numb GwG Nov. 17, 1964 R. c. AVERY TELEPHONE CALL. PROGRESS RECORDING SYSTEM 20 Sheets-Sheet 16 Filed March 6, 1962 wie ok N v QQ IIILI u IIIIXIII. l

IUE

Illll. IET. XR. wow G Nov. 17, 1964 R. c. AVERY TELEPHONE CALL RRoGREss RECORDING SYSTEM 2O Sheets-Sheet 17 Filed March 6, 1962 EN f WON me .QEA QE ab O2 @S2 5E@ @B m90 QSE@ @Si @S 5 R. c. AVERY 3,157,743

TELEPHONE CALL PROGRESS RECORDING SYSTEM 2O Sheets-Sheet 18 Nov. 17, 1964 Filed March e, 1962 Nov. 17, 1964 R. C. AVERY TELEPHONE CALL. PROGRESS RECORDING SYSTEM Filed March 6, 1962 2O Sheets-Sheet 19 Nov. 17, 1964 R. c. AVERY 3,157,743

TELEPHONE CALL PROGRESS RECORDING SYSTEM Filed March 6, 1962 20 Sheets-Sheet 20 

1. A TELEPHONE SWITCHING SYSTEM COMPRISING A CALL ORIGINATING SWITCHING CENTER AND A SECOND SWITCHING CENTER CONNECTED BY A TRUNK, AND MEANS FOR ESTABLISHING A CALL CONNECTION BETWEEN SAID SWITCHING CENTERS OVER SAID TRUNK; SAID SECOND SWITCHING CENTER COMPRISING GENERATOR MEANS FOR GENERATING A SWITCHING CENTER IDENTIFICATION SIGNAL UNIQUE TO SAID SECOND SWITCHING CENTER, AND MEANS RESPONSIVE TO A CALL OVER SAID TRUNK FROM SAID CALL ORIGINATING SWITCHING CENTER FOR TRANSMITTING SAID SWITCHING CENTER IDENTIFICATION SIGNAL BACK OVER SAID TRUNK TO SAID CALL ORIGINATING SWITCHING CENTER; SAID CALL ORIGINATING SWITCHING CENTER COMPRISING RECEIVER MEANS AND RECORDER MEANS, SAID RECEIVER MEANS RESPONSIVE TO SAID SWITCHING CENTER 